package com.principle.facade;

public class Projector {
    private static Projector projector=new Projector();
    public static Projector getInstance(){
        return projector;
    }
    public void on(){
        System.out.println("projector on");
    }
    public void off(){
        System.out.println("projector off");
    }
    public void focus(){
        System.out.println("projector is playing");
    }
    public void pause(){
        System.out.println("projector pause...");
    }
}
